Lock-shoe.



UNITED STATES Patented February 7, 1905.

PATENT lEEICE.`

LOCK-SHOE.

SPECIFICATION forming part of Letters Patent No. 782,636, dated February'7, 1905.

Application filed August 26,1904. Serial No. 222,245.

lo LH u'lwm/ it 'may concer/l.:

Be it known that l, WILLIAM CLYDE LARI- sox, a citizen of the UnitedStates, and a resident of Blossburg, in the county of Tioga and State ofPennsylvania,have invented a new and improved Lock-Shoe, of which thefollowing is a full, clear, and exact description.

My invention I'elates to lock-shoes such as are applied to wagon-wheelsto prevent slip ping. lts principal objects are to provide an etlicientand durable device of this character.

lt consists in the various features and combinations hereinafterdescribed and more particularly claimed.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the ligures.

l `igure l is a perspective view of one embodiment of my invention. Fig.2 is a longitudinal section on the lineQ 2 of Fig. et. Fig. 3 is a topplan view. Fig. et is a transverse section on the line 4 of Fig. 2, andFig. is a perspective view of one of the engaging` members.

YlO designates a main plate, which is preferably curved upon the arc ofa circle to substantially conform to the peripheryv of the wheel 'towhich it is to be applied. At each side of this plate is a retainingwall or flange l l, conveniently formed integrally therewith and shownas inclined or curved from a central point of maximum height. ln themain plate, extending from flange to flange, are openings l2, here shownas two in number, which are preferably widened at their inner sides byopposite inclined walls l2 lQL. 'lhrough these openings extend engagingmembers 13. which have 'formed upon or secured to their lower facescalks or engaging projections .14, which preferably have somewhatrounded ends. At the inner extremities of these engagingmembers areinclined flanges or enlargements 15, coacting with the walls l2" andholding the members against outward movement. .As illustrated, they areretained against niovementin the opposite direction by a locking-plate16 common to all, which is curved to conform to the main plate and is ofsuch a width as to lit between the side flanges.

In the inner side of this plate are shown three recesses 17, which maybebrought into alinementwith pairs of opposite openings 18 18, Vformed inthe flanges. Through the openings and recesses pass keys or lockingmembers 19, which at one end have heads 20, located outside the walls11, and at the opposite ends openings` to receive securing-pins 2l. Atone extremity of the main plate, which would be the rear as the deviceis in place upon the wheel, is preferably formed a rib '22, havingreduced or comparatively sharp teeth At the opposite end of the mainplate is an openingy 2l, to which may be attached a chain 25 forconnection to the draft-gear or other portion of the vehicle. The lowerface of the main plate is shown as upwardly inclined at cach end fromthe engaging' members.

In use the shoe is placed beneath the wheel which it is to lock and thechain attached as desired to some portion of the vehicle, the side wallsof the plate retaining it against movement laterally ot' the wheel. lhenif there is any tendency ol' the latter to slip or skid upon ice orinclined surfaces the engaging projections will grip and tend to preventthis, their rounded form avoiding an unduly positive checking of theadvance of the vehicle. lf the wheel runs in the shoe, slipping underthis action will he avoided by the ln'inging of the teeth of the rib?!inlo contact with the supportingsurface, their sharp edges al. oncestopping' this movement. \\'hen the engaging pro |ections are worn, theymay be readily renewed by taking out the keys, thus` `freeing the plateand enabling the engaging' members to be lifted out between the sidewalls. Fresh ones may then he applied and secured in place by reversingthese operations. 'lhis renders the other portions of the shoepractically indestructible.

Hav ingth us described my invention', I claim as new and desire tosecure by Letters Patentel. A lock-shoe comprising a main plate,retaining' members carried thereby, a plurality of independent engagingmembers `separably connected with the plate, and means common to all forsecuring the engaging members in place.

IOO

2. A lock-shoe comprising a main plate, rounded engaging projectionssituated between the ends of the plate, and a transverse series of sharpprojections at the extremity or' said plate.

3. A lock-shoe comprising' a main plate having openings, engagingprojections extending through the openings and having enlargements atthe inner side of the plate, and a locking-plate coacting with the innerends of the projections.

4. A lock-shoe comprising a main plate havingopenings, engaging'projections extending through the openings and having enlargements atthe inner side ot' the plate, a locking-plate coaeting with the innerends of the projections, and keys for securing the plate' in place.

5. A lock-shoe comprising a main plate having openings, engagingprojections ex-y tending' through the openings and having enlargementsat the inner side of the plate, a. locking-plate provided with recesseseoacting with the inner ends of the projections, and i keys lying withinthe recesses and serving to secure the plate in place.

6. A lock-shoe comprising a main plate having an opening' and beingprovided with opposite anges in which are alined openings, an engagingprojection extending through the plate-opening', and a key extendingthrough the lange-openings and serving to secure the projection inplace.

7. A lock-shoe comprising a main plate having an opening' and beingprovided with opposite flanges in which are alined openings, an engagingprojection extending through the plate-opening, a locking-platecontacting with the inner end of the engaging projection, and a keyextending through the flange-openings and contacting with thelocking-plate.

In testimony whereot` I have signed my name to this specification in thepresence of two suhscribing witnesses.

VILLIAM OLYDE LARISON. iVitnesses:

J. R. STRATTON, JOHN B. Bowne.

